Duplicate Maintenance Info
From Joomla! Documentation
Joomla!
3.4.2
In Joomla 3.4.2 some JavaScript files were updated which causes an error with browser caching.
Errors reported[edit]
Duplicate information shown in the Maintenance section in the Backend.
http://issues.joomla.org/tracker/joomla-cms/7143
http://issues.joomla.org/tracker/joomla-cms/7275
Versions affected[edit]
General Information
This pertains only to Joomla! version(s):- 3.4.2+
What is the cause[edit]
JavaScript files were updated and the browser cache has not been cleaned causing a temporarily incorrect display.
How to fix[edit]
Please clean your Browser and Joomla Cache.